To allow many users to efficiently use functions of a processing server that performs predetermined processing, via a network and also prevent a time during which an user can use the processing server, from being shortened due to a difference between the times recognized by the user side and processing server side. In a content supply system 100, in order to use a streaming server 102 to perform a live distribution, an user PC 106 to be used makes a reservation for a time zone, etc. to a server reservation control center 101 over the Internet 103. When the reservation is accepted, the server reservation control center 101 sends the real time information of the service provider side that controls the service time of the streaming server 102 based on the reservation, over the Internet 103.